Back Turning Insert Guide

Style BT inserts has a chamfer on the leading corner that improves the tool-life in harder materials. This insert is suitable when the wear on the style B insert is found in an early stage.

Style B

Style B is for general use in back turning applications in stainless steel, titanium, nimonic,
hastaloy, high temperature alloys, alloyed steel and other hard
and long chipped materials where good chip control is needed.

Style VLR

Style VLR is used for backturning when a smooth surface is needed when profiling. It is for example excellent to go in behind the head of a bone screw with.

Style BP

Style BP is used for sticky materials when there is a chance of an edge build up that can spoil the surface finish or reduce tool-life.

Style E

Style E is used for fine turning, using high cutting speed and low feed rate. This insert will give the best possible surface finish. By protecting the radius with the chamfer the tool life is extended compared with conventional full radius inserts.

Style B | Inserts for Back Turning in steel and other
hard and long chipped materials

Cutting
rake°

Stock

Price
group

Insert

A

B

C

R

V°

8M

C8

F8

B8

NF8

ND8

K11ER/L B12-2-0

2

1

0,4

0

15

12

a

a

b

b

-

-

A8

K11ER B12-2-05

2

1

0,4

0,05

15

12

r

r

r

r

-

-

A9

K11ER/L B12-3-0

3,5

1,5

0,6

0

15

12

a

a

b

b

-

-

A8

K15ER/L B12-2-0

2,5

1,3

0,5

0

15

12

a

a

b

b

-

-

A8

K15ER/L B12-4-0

4

1,9

0,7

0

15

12

a

a

b

b

r

r

A8

K15ER/L B12-4-05

4

1,9

0,7

0,05

15

12

a

a

b

b

-

-

A9

K15ER/L B12-4-1

4

1,9

0,7

0,1

15

12

a

a

b

b

r

r

A9

K15ER/L B12-4-2

4

1,9

0,7

0,2

15

12

a

a

b

b

r

r

A9

K20ER B12-7-0

7

3,2

1,3

0

15

12

r

r

r

k

-

-

A28

K20ER B12-7-2

7

3,2

1,3

0,2

15

12

r

r

r

k

r

r

A29

Style BP | Inserts for Back Turning in Sticky Materials

V°

Cutting
rake°

Stock

Price
group

Insert

A

B

C

R

Ax

Rad

8M

C8

F8

B8

NF8

ND8

K15ER BP12-2-0

2,5

1,3

0,5

0

20

12

14

r

r

r

r

-

-

A8

K15ER BP12-2-03

2,5

1,3

0,5

0,03

20

12

14

r

r

r

r

-

-

A9

K15ER BP12-2-05

2,5

1,3

0,5

0,05

20

12

14

r

r

r

r

-

-

A9

K15ER BP12-4-0

4

1,9

0,7

0

20

12

14

r

r

r

r

-

-

A8

K15ER BP12-4-1

4

1,9

0,7

0,1

20

12

14

r

r

r

r

r

r

A9

K15ER BP12-4-2

4

1,9

0,7

0,2

20

12

14

r

r

r

r

r

r

A9

Style BT | Inserts for Back Turning in Tough Materials for Longer Tool Life